Real time measurements of methanol crossover in a DMFC

Investigating design parameter effects on the methanol flux in the passive storage of a direct methanol fuel cell

“…As shown in Fig. 3, methanol crossover is calculated as the percentage of the total methanol flux transported from the feed stream to the electrode for various current densities and feed concentrations [16]. The methanol flux or crossover equation can be written as follows:…”

Two-phase modeling of mass transfer characteristics of a direct methanol fuel cell

“…Since effect of pressure gradient to methanol crossover is negligible [31], methanol crossover flux N MEOH is driven by electro-osmotic drag and concentration gradient…”

Evaluation of Gold-Coated Stainless Steel Bipolar Plates for Fuel Cell Applications

“…Thus, it has attracted attention worldwide. Several methods have been used to measure methanol crossover in DMFC [5][6][7][8][9][10]. Pukrushpan et al determined methanol crossover rates by continuously measuring the concentration of CH3OH, CO and CO2 in the exhaust gas of the cathode [5].…”

“…The CH3OH crossover rate was calculated from the time required to reach the equilibrium concentration of CH3OH on either side of the polymer electrolyte membrane. Han and Liu determined the methanol crossover rates by measuring the carbon dioxide concentration at the cathode exit in real time [9]. Kin et al proposed a relatively easy method for estimating the methanol crossover rate of a proton exchange membrane (PEM) and the efficiency of a direct methanol fuel cell (DMFC) by using current transient analysis [10].…”